The media library wasn't completely working before - specifically,
- Comments weren't working
- Then comments were fixed for new videos posted but not the old ones added before the fix was applied

Now, the first time somebody comments on a video, it will create a thread. So basically all fixed as of today for all videos .

The key thing you will notice is that for videos that have been out there for a while in the library - they will pop up as new threads when people comment for the first time. I think it's better than having all 200 of them create a thread at the same time!